Dyeability, Kinetics and Physico-Chemical Aspects of Bombyx Mori Muslin Silk Fabric with Bi-Functional Reactive Dyes

ABSTRACT

Bombyx mori

muslin silk fabric was dyed with three different bi-functional reactive dyes in exhaust method. Dyeability of the silk fabric was analyzed by reflectance spectra, microscopic appearance, color strength, and saturation limit. Thermal influence on dye exhaustion, migration index, level dyeing factor, and color fastness properties were also investigated. Different kinetic models were approached to study dynamic behavior of dye adsorption and predictability of the models was assessed by co-efficient of regression (r²), root mean square error (RMSE), and mean absolute error (MAE). Some physico-chemical parameters such as activation energy and chemical potential of dyeing were also evaluated. Brilliant color was observed on silk by all class of reactive dyes. A controlled dyeing condition was also suggested to avoid the risk of unlevel dyeing. Wet fastness properties exhibited excellent results on silk fabric. The adsorption data conformed to the pseudo second-order kinetic model with r² ≥ 0.94 and the activation energy (ΔE) valued (≥55 kJ/mol) within the range of chemisorption for all dyes. The increase of negativity of chemical potential supported higher dye uptake on silk at elevated temperature.

摘要

家蚕桑蚕丝织物用三种不同的双功能活性染料在排气法染色。通过反射光谱、微观形貌、颜色强度和饱和极限分析了真丝织物的染色性能。还研究了热对染料耗竭、迁移指数、匀染性和色牢度的影响。采用回归系数（r2）、均方根误差（RMSE）和平均绝对误差（MAE）对染料吸附的动力学行为进行了研究。还对染色活化能和化学势等物理化学参数进行了评价。所有种类的活性染料在丝绸上观察到亮丽的颜色。还提出了控制染色条件，以避免染色不匀的风险。湿牢度性能在真丝织物上表现优异。吸附数据符合拟二级动力学模型，r2≥0.94，活化能（≥55kJ/mol）在化学吸附范围内。在高温下，化学势的负性增加对蚕丝的较高的染料吸收有促进作用。

KEYWORDS:

• Bombyx mori muslin silk
• equilibrium adsorption
• dynamic migration
• standard affinity
• bi-functional reactive dyes
• activation energy

关键词:

• 家蚕蚕丝
• 平衡吸附
• 动态迁移
• 标准亲和力
• 双功能活性染料
• 活化能

Acknowledgments

The authors offer sincerest gratitude to Orient Chem-Tex Ltd. for giving the opportunity to prepare all the samples as well as providing the scopes in laboratory to perform all the tests in this research work.